hdfs interview questions and answers

Below are some of the hadoop interview questions and answers. 1. As the data is replicated thrice in HDFS, does it mean that any calculation done on one node will also be replicated on the other two? Since there are 3 nodes, when we send the MapReduce programs, calculations will […]

Below are a few more hadoop interview questions and answers for freshers and experienced hadoop developers. Hadoop Interview questions and answers 1. What is the default block size in HDFS ? As of Hadoop-2.4.0 release, the default block size in HDFS is 256 MB and prior to that it was […]

Below are a few more hadoop interview questions and answers for both freshers and experienced hadoop developers and administrators. Hadoop Interview questions and answers 1. What is a Backup Node? It is an extended checkpoint node that performs checkpointing and also supports online streaming of file system edits. It maintains […]

Below are a few more Hadoop Interview Questions and Answers. Please refer previous posts on this topic for additional questions on HDFS. Hadoop Interview Questions and Answers 1. What is HDFS ? HDFS is a distributed file system implemented on Hadoop’s framework. It is a block-structured distributed file system designed […]